55173118 has 96 divisors (see below), whose sum is σ = 117669888. Its totient is φ = 19051200.

The previous prime is 55173091. The next prime is 55173121. The reversal of 55173118 is 81137155.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 55173118.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 434371 + ... + 434497.

It is an arithmetic number, because the mean of its divisors is an integer number (1225728).

Almost surely, 2^55173118 is an apocalyptic number.

55173118 is an abundant number, since it is smaller than the sum of its proper divisors (62496770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55173118 is a wasteful number, since it uses less digits than its factorization.

55173118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 191 counting only the distinct ones).

The product of its digits is 4200, while the sum is 31.

The square root of 55173118 is about 7427.8609303083. The cubic root of 55173118 is about 380.6938339420.

The spelling of 55173118 in words is "fifty-five million, one hundred seventy-three thousand, one hundred eighteen".